my ($environment, $duration, $config) = @{$EnvsToRun->{data}};

##</code><code>##

my ($environment, $duration, $config) = @{$EnvsToRun->{data}->[0]};

##</code><code>##

for my $CurrentEnv (@{$EnvsToRun->{data}}) {
    my ($environment, $duration, $config) = @$CurrentEnv;
    ...
}

##</code><code>##

$EnvsToRun->{data} = [$environment, $duration, $config];
... later ...
($environment, $duration, $config) = @{$EnvsToRun->{data}};